title: Identification of pentahydroxystearic acid-containing taurolipid (taurolipid C) isolated from Tetrahymena thermophila.
abstract: A pentahydroxystearic acid-containing taurolipid (taurolipid C) was found in cells of Tetrahymena thermophila. The lipid accounted for about 1.2% of the total taurolipids of the cells. The lipid was subjected to mild alkaline and methanolic hydrochloric acid hydrolyses, and the structures of the hydrolyses products were identified by mass and nuclear magnetic resonance spectrometries, as taurine, non-hydroxy fatty acid and 2,3,7,12,13-pentahydroxystearic acd, a novel fatty acid. The NMR spectra of the intact and acetylated lipid showed that the carboxyl group of the pentahydrxyostearic acid was combined with the amino group of taurine, and the hydroxy group at C-3 was esterified with non-hydroxy fatty acids. From these results, the pentahydroxystearic acid-containing taurolipid (taurolipid C) isolated from T. thermophila was identified as 2-(3-acyloxy-2,7,12,13-tetrahydroxyoctadecanoylamino)ethanesulf oni c acid.
authors.affiliation: Basic Medical Sciences Division, National Institute for Environmental Studies, University of Tsukuba, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Kaya
authors.forename: T
authors.initials: T
authors.lastname: Kusumi
mesh_terms: D000818:Animals; D005227:Fatty Acids / Q000032:analysis / Q000302:isolation & purification*; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008968:Molecular Conformation; D013654:Taurine / Q000031:analogs & derivatives* / Q000302:isolation & purification; D013768:Tetrahymena / Q000378:metabolism*
chemical_list: D005227:Fatty Acids; C053552:taurolipid B; C062932:taurolipid C; D013654:Taurine